Seven sisters A, B, S, D, R, L and G are standing in a row facing north. L is standing to the immediate right of R who stands fourth to the right of G. Only S stands exactly between B and D. D stands at the middle position. Who stands at the rightmost position?

A

Only S stands exactly between B and D. D stands in the middle position.

CASE 1:

_   B    S   D    _    _   _

CASE 2:

_   _    _   D    S    D   _

L is standing to the immediate right of R who stands fourth to the right of G.

CASE 1:

G   B    S   D    R    L   _

CASE 2:

It is not possible because in this case, R will be at the extreme right end. So, L cannot stand at the immediate right of R.

So, the only position for A is at the extreme right end.

G   B    S   D    R    L   A

∴ A is at the rightmost position.